EinTopaz

It was particularly bad on one socket the rest were ok, the one particularly bad one was on the wall adjoining the rest of the property and the cable to it is fed from the ventilated subfloor of the rest of the property where it's joined into one of the ring mains down there. So perhaps the draught was coming from there for the socket. The wall lights however are definitely fed from above, and they were very draughty. I mean even with dot and dab should this much air be coming in? One thing I suspected was that the builders didn't insulate the eaves properly, where the wall insulation meets the roof insulation. When I did our loft and eaves I went through this myself and made sure everything tesselated and was taped up etc. Im not sure they've done that and whether that's contributing to just how cold/draughty this room is. Could that be worth investigating?

Attached, I think I know what is causing that. Before the extension was built there was an extractor fan vent there for the downstairs bathroom, when the extension was built the builders said they added on routed the ducting for it up and out one of the tools in the pitched extension roof. I've seen it from the exterior but haven't investigated how they ran it though the roof and how neat the connection is etc. Though I suspect it's gotta be that, as thats exactly where the duct would've been.

on walls yes dot and dab, for the ceiling the plasterboard was hardfixed to the roof. Can see the dabs on the thermal images posted above.

I can feel the strong draughts with my hand. Every socket had them, every light fixture. I've plugged them all with rockwool now but any idea why that's happening? it felt like a gale wind blowing in my face in some of those openings. Really surprised so much air was getting in. Could be warmth getting to the rest of the house but see the thermal images posted above. They do tell a different story, definitely warm air leaking out by the looks of it. To be honest the rad sizes aren't a concern, its that that room when unheated is only a few degrees warmer than outside temp, and that can't be right surely.

Interesting, I hadn't considered the steel. How much of an effect would that sort of bridge have if not insulated properly? I suspect you are correct that it's a sum of the parts. I feel like i'm catching them one by one (i.e the wall light draughts) but they're not really notably improving the comfort/thermal levels of this room. Which is concerning me. I'll likely have more images than this, but these ones cover a good swathe of the interior. Then on the Exterior, these were the most concerning areas I saw... Really no idea why so much warmth is coming out of that portion of the pitched roof. Surely that's not normal.

It is alot of glass and i'm fine to upgrade to something better thermally if I need to, though I guess that wouldn't explain the draughts. Spec wise, they're standard 28mm double glazed units, from memory spec was U value of 1.3 or so. Though I believe one of them has failed. It's showing much colder on the inside, and transmitting more heat from the outside when you view via thermal cam. Images below.

Hi all, i've been looking for some guidance to help troubleshoot and solve a cold extension we've got and this forum felt a good place to ask. It's a single story gabel extension (6meter x 5 meter, vaulted ceiling) done about a year ago, we noticed this Winter that something isn't right regarding it's temperature and comfort levels. At this point i'm not sure whether it's due to draughts or something else contributing to the heat not being retained well , but it's notably colder in this room than any other, which has struck me as odd as the rest of the property is 1950's; suspended floorboards and not the biggest cavities in the world etc, where as this new room is the only room in the property that's been built to modern standards(tm), yet it's a good 3degrees cooler than the other rooms. We specced 5kw of radiators in there, and a 7kw gas fire for good measure. It gets warm at a reasonable rate, but the issue is once the heating goes off, the temperature rapidly falls. I.e last night it was dropping maybe a good 2degrees an hour at the worst. It doesn't just feel cold either, I have noticed pretty strong draughts when i've removed sockets or wall/ceiling light fixtures which I found alarming. With that in mind, i'm becoming concerned that the coldness and amount of draughts in this room may be an issue stemming from when it was constructed, so I figured it'd be good idea to put some images up of the construction stages to see if anyone can notice anything that may be contributing to, so i'll put some images below. From memory the insulation was all PIR and 100+50mm in the roof, 100mm in the walls and 100mm in the floor. I've got some thermal images I can share too but i've hit my limit for this post so i guess before I do, What do you guys think of the build? Anything stand out as looking bad? thoughts very welcome and appreciated, i'm at my witts end with it and open prepared to go as far as necessary to get this fixed. thanks all, G

Hi all, Just wanted to introduce myself, i'm a joiner and interior designer by trade, joined here to discuss some building work that's either still to happen, or happened already and looking to get some opinions on it. A friend actually recommended this forum to me and insisted that it'd be a good place to chat and get some interesting perspectives from. so hello! and cheers! Ged